Which variable has the highest mean?

Which variable has the highest mean deviation?

Which variable has the highest standard deviation?

Table 1 Data

i x y z

1 10 22 24

2 5 10 23

3 3 6 22

4 7 10 20

5 2 1 21

6 5 3 22

7 6 1 25

8 1 26 24

9 9 18 22

10 8 2 21